blob: 32629a2040dfc3da9cba619cce977e86d7701334 [file] [log] [blame]
// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <fuchsia/sys/cpp/fidl.h>
#include <lib/syslog/cpp/macros.h>
#include <string>
#include <string_view>
#include <unordered_set>
#include <utility>
#include <vector>
#include "lib/fidl/cpp/binding_set.h"
#include "src/lib/fxl/macros.h"
#include "src/lib/fxl/memory/weak_ptr.h"
#include "src/lib/storage/vfs/cpp/pseudo_dir.h"
#include "src/lib/storage/vfs/cpp/service.h"
#include "src/lib/storage/vfs/cpp/synchronous_vfs.h"
#include "src/lib/storage/vfs/cpp/vfs_types.h"
#include "src/sys/appmgr/log_connector_impl.h"
#include "src/sys/appmgr/moniker.h"
namespace component {
constexpr char kUnknownComponent[] = "<unknown v2 component>";
// A directory-like object which dynamically creates Service vnodes
// for any file lookup. It also exposes service provider interface.
// It supports enumeration for only first level of services.
class ServiceProviderDirImpl : public fuchsia::sys::ServiceProvider, public fs::Vnode {
explicit ServiceProviderDirImpl(fbl::RefPtr<LogConnectorImpl> log_connector,
const std::vector<std::string>* services = nullptr);
~ServiceProviderDirImpl() override;
// Sets the parent of this. Parent should be fully initialized.
void set_parent(fbl::RefPtr<ServiceProviderDirImpl> parent);
const std::string& component_url() const { return component_url_; }
const std::string& component_moniker() const { return component_moniker_; }
void set_component_moniker(const Moniker& moniker) {
component_moniker_ = moniker.ToString();
component_url_ = moniker.url;
void set_component_id(const std::string& id) { component_id_ = id; }
void AddService(const std::string& service_name, fbl::RefPtr<fs::Service> service);
void AddBinding(fidl::InterfaceRequest<fuchsia::sys::ServiceProvider> request);
// Overridden from |fs::Vnode|:
fs::VnodeProtocolSet GetProtocols() const final;
zx_status_t Lookup(std::string_view name, fbl::RefPtr<fs::Vnode>* out) final;
zx_status_t GetAttributes(fs::VnodeAttributes* a) final;
zx_status_t Readdir(fs::VdirCookie* cookie, void* dirents, size_t len, size_t* out_actual) final;
zx_status_t GetNodeInfoForProtocol(fs::VnodeProtocol protocol, fs::Rights rights,
fs::VnodeRepresentation* representation) final;
// Overridden from |fuchsia::sys::ServiceProvider|:
void ConnectToService(std::string service_name, zx::channel channel) override;
// Initialize LogConnector and LogSink services if needed. Should be called *after*
// other namespace setup steps so that parent-provided versions of those services will
// take precedence.
void InitLogging();
bool IsServiceAllowlisted(const std::string& service_name) {
return (!has_services_allowlist_ || services_allowlist_.count(service_name) > 0);
fidl::BindingSet<fuchsia::sys::ServiceProvider> bindings_;
fs::SynchronousVfs vfs_;
// |root_| has all services offered by this provider (including those
// inherited from the parent, if any).
fbl::RefPtr<fs::PseudoDir> root_;
fbl::RefPtr<ServiceProviderDirImpl> parent_;
fbl::RefPtr<LogConnectorImpl> log_connector_;
fxl::WeakPtrFactory<ServiceProviderDirImpl> weak_factory_;
bool has_builtin_logsink_ = false;
// TODO( Remove has_services_allowlist_ when empty services is
// equivalent to no services.
bool has_services_allowlist_ = false;
std::unordered_set<std::string> services_allowlist_;
// Secondary storage for services under |root_| in a format that can easily
// be consumed by children. Stored as vector to preserve order.
typedef std::pair<std::string, fbl::RefPtr<fs::Service>> ServiceHandle;
std::vector<ServiceHandle> service_handles_;
std::unordered_set<std::string> all_service_names_;
std::set<std::string> service_not_available_warnings_logged_;
std::string component_moniker_ = kUnknownComponent;
std::string component_url_ = kUnknownComponent;
std::string component_id_ = "-1";
} // namespace component